遺傳算法在天線陣自適應(yīng)算法中的應(yīng)用
APPLYING GENETIC ALGORITHM TO ADAPTIVE ARRAY
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摘要: 本文采用一種新的基于遺傳算法的天線陣列的自適應(yīng)算法。根據(jù)實(shí)際的硬件限制,不改變陣列的幅度加權(quán),而通過(guò)遺傳算法對(duì)相位加權(quán)作全局優(yōu)化。為減小對(duì)天線方向圖的破壞,并希望在干擾源來(lái)波方向?qū)崟r(shí)置零,因而采用只優(yōu)化搜索數(shù)字移相器的最后幾位。計(jì)算機(jī)模擬結(jié)果證實(shí)了這種方法的有效性。
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關(guān)鍵詞:
- 遺傳算法; 自適應(yīng)天線陣; 和差方向圖
Abstract: In this paper, a new approach based on genetic algorithm (GA) is applied to adaptive array, in according to the limitation of hardware, the amplitude weights are not changed, but the phase weights are optimized globally with genetic algorithm. For reducing the perturbations to the far field pattern and placing multiple deep nulls real-time in the directions of interference, a genetic algorithm adjusts some of the least significant bits of the beam steering phase shifters. Simulation results confirm the theoretical work. -
Steyskal H. Methods for null control and their effects on radiation pattern. IEEE Trans. On AP,1986, AP-34(3): 163-166.[2]Monzingo R A, Miller T W. Introduction to Adaptive Antennas. New York: Wiley, 1980, Chapter.2.［3］Haupt R L. Adaptive nulling in monopulse antenna. IEEE Trans.on AP, 1988, AP-36(2): 202-208.[3]劉勇等.非數(shù)值并行算法--遺傳算法.科學(xué)出版社,1995年,第二章[4]Haupt R L. Phase-only adaptive nulling with a genetic algorithm. IEEE Trans. On AP, 1997,AP-45(6): 1009-1015.[5]Deford J F, Gandhi O P, Phase-only synthesis of minimum peak sidelobe patterns for linear and planar arrays. IEEE Trans. On AP, 1988, AP-36(2): 191-201.[6]Shore R A. A proof of the odd-symmetry of the phases for minimum weight peturbation phaseonly null synthesis. IEEE Trans. On AP, 1984, AP-32(5): 528-530.[7]汪茂光.陣列天線分析與綜合.成都:電子科技大學(xué)出版社,1989年,第二章.[8]Johnson S M, Yahya Rahmat-Samii. Genetic algorithms in engineering electromagnetics. IEEE AP magzine, 1997, APM-39(4): 7-24. -
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